Lu Ming-Hui, Liu Xiao-Kang, Feng Liang, Li Jian, Huang Cheng-Ping, Chen Yan-Feng, Zhu Yong-Yuan, Zhu Shi-Ning, Ming Nai-Ben
National Laboratory of Solid State Microstructures, Department of Materials Science and Engineering, Nanjing University, Nanjing, 210093, People's Republic of China.
Phys Rev Lett. 2007 Oct 26;99(17):174301. doi: 10.1103/PhysRevLett.99.174301. Epub 2007 Oct 24.
Recently, there has been an increased interest in studying extraordinary optical transmission (EOT) through subwavelength aperture arrays perforated in a metallic film. In this Letter, we report that the transmission of an incident acoustic wave through a one-dimensional acoustic grating can also be drastically enhanced. This extraordinary acoustic transmission (EAT) has been investigated both theoretically and experimentally, showing that the coupling between the diffractive wave and the wave-guide mode plays an important role in EAT. This phenomenon can have potential applications in acoustics and also might provide a better understanding of EOT in optical subwavelength systems.
最近，人们对研究通过金属薄膜上穿孔的亚波长孔径阵列的超常光学传输（EOT）越来越感兴趣。在本信函中，我们报告了入射声波通过一维声光栅的传输也能得到显著增强。这种超常声传输（EAT）已通过理论和实验进行了研究，结果表明衍射波与波导模式之间的耦合在EAT中起着重要作用。这一现象在声学领域可能具有潜在应用，并且也可能有助于更好地理解光学亚波长系统中的EOT。
